CN215256430U - Middle exhaust pipe, exhaust manifold and EGR system - Google Patents
Middle exhaust pipe, exhaust manifold and EGR system Download PDFInfo
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- CN215256430U CN215256430U CN202121340268.1U CN202121340268U CN215256430U CN 215256430 U CN215256430 U CN 215256430U CN 202121340268 U CN202121340268 U CN 202121340268U CN 215256430 U CN215256430 U CN 215256430U
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Abstract
The utility model provides an intermediate exhaust pipe, an exhaust main pipe and an EGR system, wherein the intermediate exhaust pipe comprises a pipe body, and an inner cavity of the pipe body is divided into a first flow passage and a second flow passage which are independent by a partition in the pipe body; the pipe body is provided with a first inlet, an EGR gas taking port, a first outlet, a second inlet and a second outlet, wherein the first inlet, the EGR gas taking port and the first outlet are communicated with the first flow passage; the partition is provided with a valve port for communicating the first flow channel and the second flow channel, the partition is provided with a valve plate, and the pipe body is provided with an executing piece for driving the valve plate to rotate so as to enable the valve port to be fully opened, fully closed or partially opened; when the valve port is fully opened, the second flow channel is cut off, and all gas entering the second flow channel through the second inlet enters the first flow channel through the valve port. The exhaust manifold includes a left exhaust pipe, a right exhaust pipe, and an intermediate exhaust pipe. The EGR system includes the exhaust manifold described above. The utility model discloses can satisfy the demand of EGR rate under the different work condition, and can effectively improve engine low-speed responsiveness, satisfy the requirement of high-speed operating mode economic nature simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the engine exhaust, especially, relate to an intermediate vent-pipe, exhaust manifold and EGR system.
Background
Exhaust Gas Recirculation (EGR), a technique in which a part of Exhaust Gas is introduced into intake air after combustion in an internal combustion engine for an automobile to be re-combusted, can reduce nitrogen oxides (NOx) in Exhaust Gas and improve fuel economy. At present, an intermediate exhaust pipe for EGR gas taking is internally provided with two independent gas flow channels, and two independent gas fluids are respectively and correspondingly communicated with two flow channels of a turbine in a supercharger; when the arrangement form is matched with the supercharger, due to the characteristics of the supercharger, the efficiency is difficult to realize in a low-speed and high-torque area, the matching of the supercharger is difficult to meet the requirements of high speed and low speed, the turbine of the supercharger is required to be as small as possible for low-speed response and high EGR rate, high-speed economical efficiency is poor, and the overspeed limit of the supercharger is limited, so that the matching of the supercharger alone is difficult to realize good power response and economical efficiency.
SUMMERY OF THE UTILITY MODEL
Aim at overcoming the problem that exists among the above-mentioned prior art, the utility model aims to provide an intermediate vent pipe, exhaust manifold and EGR system can satisfy the demand of EGR rate under the different operating modes, and can effectively improve the low-speed responsiveness of engine, satisfies the requirement of high-speed operating mode economic nature simultaneously.
In order to solve the problems existing in the prior art, the embodiment of the utility model provides an intermediate exhaust pipe, which comprises a pipe body which is internally provided with a partition and is Y-shaped or T-shaped, wherein the partition divides an inner cavity of the pipe body into a first flow passage and a second flow passage which are mutually independent;
the pipe body is provided with a first inlet, an EGR gas taking port, a first outlet, a second inlet and a second outlet, wherein the first inlet, the EGR gas taking port and the first outlet are respectively communicated with the first flow passage; the partition is provided with a valve port for communicating the first flow channel and the second flow channel, the partition at the valve port is rotatably provided with a valve plate, and the pipe body is provided with an executing piece for driving the valve plate to rotate so as to enable the valve port to be fully opened, fully closed or partially opened;
when the valve port is fully opened, the second flow channel is blocked by the valve plate, and all gas entering the second flow channel through the second inlet enters the first flow channel through the valve port;
when the valve port is partially opened, a part of the gas entering the second flow passage through the second inlet enters the first flow passage through the valve port, and the rest of the gas exits the second outlet.
Further, the valve plate comprises a body and a rotating shaft fixedly connected with the body; the partition at the valve port is provided with a hinge lug; the pivot is rotated and is installed on the hinge lug, the pivot stretches out the one end of body with executive component fixed connection.
Further, the actuating member is a motor.
Further, the pipe body comprises a first pipe section, a second pipe section and a vertical pipe section, and the first pipe section and the second pipe section are symmetrically arranged;
the first inlet comprises a first communication port arranged at the end part of the first pipe section and a first exhaust interface arranged on the first pipe section;
the second inlet comprises a second communication port arranged at the end part of the second pipe section and a second exhaust interface arranged on the second pipe section;
the first outlet and the second outlet are both arranged at the end part of the vertical pipe section.
Further, the EGR gas taking port is arranged at the side part of the vertical pipe section.
The embodiment of the utility model also provides an exhaust main pipe, which comprises a left exhaust pipe and a right exhaust pipe; the left exhaust pipe is communicated with the first communication port, and the right exhaust pipe is communicated with the second communication port;
and a third exhaust interface and a fourth exhaust interface are arranged on the left exhaust pipe, and a fifth exhaust interface and a sixth exhaust interface are arranged on the right exhaust pipe.
The embodiment of the utility model also provides an EGR system, which comprises a turbocharger and an EGR gas taking unit; the exhaust manifold is also comprised; the first outlet and the second outlet are communicated with corresponding exhaust gas flow passages in the turbocharger; the EGR gas taking port is communicated with the EGR gas taking unit; the first exhaust interface, the second exhaust interface, the third exhaust interface, the fourth exhaust interface, the fifth exhaust interface, and the sixth exhaust interface are respectively communicated with an exhaust manifold of a corresponding cylinder; the executive component is electrically connected with the control unit.
Further, the control unit is an engine ECU; alternatively, the control unit is in communication connection with the engine ECU.
Further, the EGR gas taking unit comprises an EGR gas taking pipeline, and an EGR cooler and an EGR valve are arranged on the EGR gas taking pipeline.
Further, the EGR valve is located downstream of the EGR cooler.
Since the technical scheme is used, the utility model discloses the beneficial effect who gains as follows:
the middle exhaust pipe in the utility model comprises a Y-shaped or T-shaped pipe body with a partition inside, wherein the partition divides the inner cavity of the pipe body into a first flow passage and a second flow passage which are mutually independent; the pipe body is provided with a first inlet, an EGR gas taking port, a first outlet, a second inlet and a second outlet, wherein the first inlet and the EGR gas taking port are respectively communicated with the first flow passage; the partition is provided with a valve port for communicating the first flow channel and the second flow channel, the partition at the valve port is rotatably provided with a valve plate, and the pipe body is provided with an executing piece for driving the valve plate to rotate so as to enable the valve port to be fully opened, fully closed or partially opened. The exhaust manifold includes a left exhaust pipe, a right exhaust pipe, and an intermediate exhaust pipe. The EGR system comprises a turbocharger, an EGR gas taking unit and an exhaust manifold.
When the valve port is fully closed, the flow rates of waste gas in the first flow passage and the second flow passage are consistent, and an exhaust main pipe provided with the middle exhaust pipe is identical to a traditional pulse exhaust pipe, so that a certain EGR rate requirement can be realized, and the requirements of emission and economy can be met at medium-high speed and load. When the valve port is fully opened, the second flow channel is stopped by the valve plate, all gas entering the second flow channel through the second inlet enters the first flow channel through the valve port, namely all waste gas flows into one flow channel of the supercharger through the first outlet, the pressure in front of the turbine is rapidly increased, higher EGR rate can be realized under the working conditions of low speed, large torque and low speed and low load, in addition, the problem of insufficient air inlet under the working condition of low speed and large torque can be solved, and the problem of slow response at low speed can be effectively solved because the increase of the flow speed at the inlet of the turbine can effectively improve the boost pressure. When the valve port is partially opened, one part of the gas entering the second flow channel through the second inlet enters the first flow channel through the valve port, and the rest part of the gas flows out of the second outlet; and the reasonable distribution of the exhaust gas flow in the two runners is realized, so that the requirements of EGR rate and excess air coefficient are met.
To sum up, the utility model discloses can satisfy the demand of EGR rate under the different work condition, effectively improve the low-speed responsiveness of engine, satisfy the requirement of high-speed operating mode economic nature simultaneously.
Drawings
FIG. 1 is a schematic structural view of an intermediate exhaust pipe according to the present invention;
FIG. 2 is a schematic view of the middle exhaust pipe of the present invention at another viewing angle;
FIG. 3 is a sectional view taken at A _ A in FIG. 2 (the valve port is in a fully closed state);
FIG. 4 is a reference view of the valve port in a partially open condition;
FIG. 5 is a reference view of the valve port in a fully open condition;
FIG. 6 is a schematic structural view of the exhaust manifold of the present invention;
FIG. 7 is a schematic diagram of the EGR system of the present invention;
in the figure: 1-pipe body, 11-first flow passage, 12-second flow passage, 13-EGR gas taking port, 14-first communication port, 15-first exhaust interface, 16-first outlet, 17-second communication port, 18-second exhaust interface, 19-second outlet, 2-partition, 21-valve port, 22-hinge lug, 3-valve plate, 31-body, 32-rotating shaft, 4-actuator, 5-left exhaust pipe, 51-third exhaust interface, 52-fourth exhaust interface, 6-right exhaust pipe, 61-fifth exhaust interface, 62-sixth exhaust interface, 7-turbocharger, 8-EGR gas taking unit, 81-EGR gas taking pipeline, 82-EGR cooler, 83-EGR valve and 9-intake manifold.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The first embodiment is as follows:
as shown in fig. 1 to 5, the present embodiment discloses an intermediate exhaust pipe, which is a part of an exhaust manifold; specifically, the pipe comprises a pipe body 1 (with three ends) which is internally provided with a partition 2 and is Y-shaped or T-shaped, and for convenience of understanding, the pipe body 1 is defined to be composed of a first pipe section, a second pipe section and a vertical pipe section, wherein the first pipe section and the second pipe section are symmetrically arranged. The partition 2 divides the inner cavity of the pipe body 1 into a first flow passage 11 (consisting of the inner cavity of the first pipe section and a half of the inner cavity of the vertical pipe section) and a second flow passage 12 (consisting of the inner cavity of the second pipe section and the other half of the inner cavity of the vertical pipe section) which are mutually independent and symmetrical; the pipe body 1 is provided with a first inlet, an EGR gas intake port 13, a first outlet 16, a second inlet and a second outlet 19, which are respectively communicated with the first flow passage 11, and the second inlet and the second outlet are respectively communicated with the second flow passage 12. The first inlet comprises a first communication port 14 arranged at the end part of the first pipe section and a first exhaust interface 15 arranged at the side part of the first pipe section; the second inlet comprises a second communication port 17 arranged at the end part of the second pipe section and a second exhaust interface 18 arranged at the side part of the second pipe section; the first outlet 16 and the second outlet 19 are both arranged at the end part of the vertical pipe section (the partition 2 divides the outlet arranged at the end part of the vertical pipe section into the first outlet 16 and the second outlet 19); the EGR gas intake port 13 is provided at a side portion of the vertical pipe section.
In addition, the partition 2 in this embodiment is further provided with a valve port 21 for communicating the first flow channel 11 and the second flow channel 12, the partition 2 at the valve port 21 is rotatably provided with a valve plate 3, and the pipe body 1 is provided with an actuator 4 for driving the valve plate 3 to rotate so as to open, close or partially open the valve port 21; when the valve port 21 is fully opened, the second flow channel 12 is blocked by the valve plate 3, and all the gas entering the second flow channel 12 through the second inlet (the second communication port 17 and the second exhaust interface 18) enters the first flow channel 11 through the valve port 21; when the valve port 21 is partially opened, a part of the gas entering the second flow channel 12 through the second inlet enters the first flow channel 11 through the valve port 21, and the rest flows out of the second outlet 19.
In this embodiment, the valve plate 3 includes a body 31 and a rotating shaft 32 fixedly connected to the body 31; the partition 2 at the valve port 21 is provided with a hinge lug 22; the rotating shaft 32 is rotatably mounted on the hinge lug 22, and one end of the rotating shaft 32 extending out of the tube body 1 is fixedly connected with the actuating member 4. The actuator 4 in this embodiment is preferably a motor.
When the valve port 21 is fully closed (shown in fig. 3), the exhaust gas flow rates in the first flow passage 11 and the second flow passage 12 are the same, and the exhaust manifold provided with the intermediate exhaust pipe is equivalent to a conventional pulse exhaust pipe, so that a certain EGR rate requirement can be realized, and the requirements of emission and economy can be met at medium-high speed and load. When the valve port 21 is fully opened (shown in fig. 5), the second flow channel 12 is cut off by the valve plate 3, all gas entering the second flow channel 12 through the second inlet enters the first flow channel 11 through the valve port 21, namely all waste gas flows into one flow channel of the supercharger through the first outlet 16, the front pressure of the turbine is rapidly increased, a higher EGR rate can be realized under the working conditions of low speed, large torque and low speed and low load, in addition, the boost pressure can be effectively improved due to the increase of the inlet flow speed of the turbine, so that the problem of insufficient air intake under the working conditions of low speed, large torque and slow low speed response can be effectively solved. When the valve port 21 is partially opened (shown in fig. 4), a part of the gas entering the second flow channel 12 through the second inlet enters the first flow channel 11 through the valve port 21, and the rest flows out of the second outlet 19; the reasonable distribution of the exhaust gas flow in the two runners is realized, namely the flexible adjustment of the asymmetry of the two runners of the turbine is realized, so that the requirements of an EGR rate and an excess air coefficient are met, namely the asymmetry of the two runners of the turbine is flexible and adjustable. No matter what state the valve port 21 is, the exhaust back pressure of each cylinder is the same, so the uniformity of each cylinder can be maintained better.
Example two:
as shown in fig. 6, the present embodiment discloses an exhaust manifold suitable for a six-cylinder engine, which includes a left exhaust pipe 5 with a closed left end, a right exhaust pipe 6 with a closed right section, and an intermediate exhaust pipe disclosed in the first embodiment, where the left exhaust pipe 5 is communicated with a first communication port 14, and the right exhaust pipe 6 is communicated with a second communication port 17; the left exhaust pipe 5 is provided with a third exhaust port 51 and a fourth exhaust port 52, and the right exhaust pipe 6 is provided with a fifth exhaust port 61 and a sixth exhaust port 62
The first exhaust port 15 is used for being connected with an exhaust manifold of the cylinder 3#, the second exhaust port 18 is used for being connected with an exhaust manifold of the cylinder 4#, the third exhaust port 51 is used for being connected with an exhaust manifold of the cylinder 2#, and the fourth exhaust port 52 is used for being connected with an exhaust manifold of the cylinder 1 #; the fifth exhaust port 61 is connected to the exhaust manifold of the cylinder 5# and the sixth exhaust port 62 is connected to the exhaust manifold of the cylinder 6 #.
Example three:
as shown in fig. 7, the present embodiment discloses an EGR system including a turbocharger 7 (dual-flow turbocharger), an EGR gas taking unit 8, and an exhaust manifold as disclosed in the second embodiment; the first outlet 16 and the second outlet 19 are communicated with corresponding exhaust gas flow passages in the turbocharger (turbine); the EGR gas taking port 13 is communicated with the EGR gas taking unit 8; the six exhaust ports are communicated with the exhaust manifolds of the corresponding cylinders; the actuator 4 (shown in fig. 1) is electrically connected to the control unit.
In this embodiment, the EGR gas taking unit 8 includes an EGR gas taking pipe 81 having one end communicating with the EGR gas taking port 13 and the other end communicating with the intake manifold 9, and the EGR gas taking pipe 81 is provided with an EGR cooler 82 and an EGR valve 83. Where the EGR valve 83 is located downstream of the EGR cooler 82.
In some embodiments, the control unit is a controller independent from the engine ECU, and the controller is in communication connection with the engine ECU for information sharing and data interaction.
In the present specification, the same and similar parts among the respective embodiments may be referred to each other.
In a word, the utility model discloses can satisfy the demand of EGR rate under the different work condition, effectively improve the low-speed responsiveness of engine, satisfy the requirement of high-speed operating mode economic nature simultaneously.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An intermediate exhaust pipe comprises a Y-shaped or T-shaped pipe body which is internally provided with a partition, wherein the partition divides an inner cavity of the pipe body into a first flow passage and a second flow passage which are mutually independent;
the pipe body is provided with a first inlet, an EGR gas taking port, a first outlet, a second inlet and a second outlet, wherein the first inlet, the EGR gas taking port and the first outlet are respectively communicated with the first flow passage; the valve is characterized in that a valve port for communicating the first flow channel with the second flow channel is arranged on the partition, a valve plate is rotatably arranged on the partition at the valve port, and an executing piece for driving the valve plate to rotate so as to enable the valve port to be fully opened, fully closed or partially opened is arranged on the pipe body;
when the valve port is fully opened, the second flow channel is blocked by the valve plate, and all gas entering the second flow channel through the second inlet enters the first flow channel through the valve port;
when the valve port is partially opened, a part of the gas entering the second flow passage through the second inlet enters the first flow passage through the valve port, and the rest of the gas exits the second outlet.
2. The intermediate exhaust pipe according to claim 1, wherein the valve sheet includes a body and a rotating shaft fixedly connected to the body; the partition at the valve port is provided with a hinge lug; the pivot is rotated and is installed on the hinge lug, the pivot stretches out the one end of body with executive component fixed connection.
3. The intermediate exhaust duct of claim 2, wherein the actuator is an electric motor.
4. The intermediate exhaust pipe according to claim 1, wherein the pipe body includes a first pipe section, a second pipe section, and an upright pipe section, the first pipe section and the second pipe section being symmetrically arranged;
the first inlet comprises a first communication port arranged at the end part of the first pipe section and a first exhaust interface arranged on the first pipe section;
the second inlet comprises a second communication port arranged at the end part of the second pipe section and a second exhaust interface arranged on the second pipe section;
the first outlet and the second outlet are both arranged at the end part of the vertical pipe section.
5. The intermediate exhaust pipe according to claim 4, wherein the EGR intake port is provided at a side portion of the vertical pipe section.
6. An exhaust manifold includes a left exhaust pipe and a right exhaust pipe; the exhaust pipe according to claim 4 or 5, wherein the left exhaust pipe is in communication with the first communication port, and the right exhaust pipe is in communication with the second communication port;
and a third exhaust interface and a fourth exhaust interface are arranged on the left exhaust pipe, and a fifth exhaust interface and a sixth exhaust interface are arranged on the right exhaust pipe.
7. An EGR system includes a turbocharger and an EGR gas extraction unit; an exhaust manifold according to claim 6; the first outlet and the second outlet are communicated with corresponding exhaust gas flow passages in the turbocharger; the EGR gas taking port is communicated with the EGR gas taking unit; the first exhaust interface, the second exhaust interface, the third exhaust interface, the fourth exhaust interface, the fifth exhaust interface, and the sixth exhaust interface are respectively communicated with an exhaust manifold of a corresponding cylinder; the executive component is electrically connected with the control unit.
8. The EGR system of claim 7 wherein the control unit is an engine ECU; alternatively, the control unit is in communication connection with the engine ECU.
9. The EGR system of claim 7, wherein the EGR gas-extraction unit comprises an EGR gas-extraction line, and an EGR cooler and an EGR valve are arranged on the EGR gas-extraction line.
10. The EGR system of claim 9 wherein the EGR valve is located downstream of the EGR cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121340268.1U CN215256430U (en) | 2021-06-16 | 2021-06-16 | Middle exhaust pipe, exhaust manifold and EGR system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121340268.1U CN215256430U (en) | 2021-06-16 | 2021-06-16 | Middle exhaust pipe, exhaust manifold and EGR system |
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| CN215256430U true CN215256430U (en) | 2021-12-21 |
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| CN202121340268.1U Active CN215256430U (en) | 2021-06-16 | 2021-06-16 | Middle exhaust pipe, exhaust manifold and EGR system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030842A (en) * | 2022-08-10 | 2022-09-09 | 潍柴动力股份有限公司 | Exhaust pipe for EGR route |
| CN117090675A (en) * | 2023-10-16 | 2023-11-21 | 潍柴动力股份有限公司 | Exhaust pipe, optimal design method of exhaust pipe and engine |
-
2021
- 2021-06-16 CN CN202121340268.1U patent/CN215256430U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030842A (en) * | 2022-08-10 | 2022-09-09 | 潍柴动力股份有限公司 | Exhaust pipe for EGR route |
| CN115030842B (en) * | 2022-08-10 | 2022-11-29 | 潍柴动力股份有限公司 | Exhaust pipe for EGR route |
| CN117090675A (en) * | 2023-10-16 | 2023-11-21 | 潍柴动力股份有限公司 | Exhaust pipe, optimal design method of exhaust pipe and engine |
| CN117090675B (en) * | 2023-10-16 | 2024-01-16 | 潍柴动力股份有限公司 | Exhaust pipe, optimal design method of exhaust pipe and engine |
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